from typing import List, Dict
import re

class TextProcessor:
    """文本处理工具类"""
    
    @staticmethod
    def clean_text(text: str) -> str:
        """清理文本"""
        # 移除多余空白
        text = re.sub(r'\s+', ' ', text)
        # 移除特殊字符
        text = re.sub(r'[^\w\s\u4e00-\u9fff]', '', text)
        return text.strip()
    
    @staticmethod
    def split_text(text: str, max_length: int = 500) -> List[str]:
        """分割文本"""
        # 按句子分割
        sentences = re.split(r'[。！？]', text)
        chunks = []
        current_chunk = ""
        
        for sentence in sentences:
            if len(current_chunk) + len(sentence) <= max_length:
                current_chunk += sentence
            else:
                if current_chunk:
                    chunks.append(current_chunk)
                current_chunk = sentence
                
        if current_chunk:
            chunks.append(current_chunk)
            
        return chunks

    @staticmethod
    def extract_keywords(text: str, top_k: int = 10) -> List[str]:
        """提取关键词"""
        # TODO: 实现关键词提取
        pass 